Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e05af19cc64c4a9be3854d51aa44a51e79bec71beb1a3e70cee0ad21c84a5edd' 
  AND token = 'q3FfRvekJ8Q+Tw2mkXbO9yXRWM2epfyeqMlyLDEWKc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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