Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b60317887c69aab05836d946db4138473eb40ca9374f79b428bbd5d94918b26b' 
  AND token = 'OBQP/K0oQvjw/rCqvDwSTyuTTllEpo4t3Eqont0bYZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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