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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c95575b871034ccec33767d227a8323c6f6cda01dad9ce519e156db361759564' 
  AND token = 'F9zz6ABKwtg/PlGoxRk3p3mrbCP/S5aDZpb93L3VFVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}