SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7317e5c4882f875df8574e2a9295296f3cd277d34d5755a30746cfc9f5ab982' 
  AND token = '+F9YGGCsOJ5V3jqOikm5PHJwRvIbhQ11LX/k5VONB6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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