Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf9137fdf975291a94c0ad48498423d47417e5eb288e2d597feaefcc1269ff9a' 
  AND token = '9nEHq+egTWiRVoxdhtFp7oqvGBdp+6Y/T4NN0I3fIbI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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