Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f3b1021ec2c11ffdafba32af3f6bb6ddf9970a2678848a18b23f2978bf6e936c' 
  AND token = '1FtpOxDNgT7utnoxN56qhT6G7xgBSwSiClqAnSOJIVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}