Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc589800ecf6f2c1c66d2cd1d7f0f8ecef735c3d44f6039f5722cc9693915acd' 
  AND token = 'E3bmg3tGKc2hvVXjW17ervaNH9mNUOGF1TGKUnS853c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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