Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acdb84df115b88b8b10e05ec04f1a14be1baeef9949b9a367e3e40323103fb64' 
  AND token = 'hwpv8aqZmZSASz4XC1QDG7mNCtuD/TleK570UZjWvbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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