Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5991cfd58028de2410c605a35aedf8435888338c483c8d99367d47843f50308' 
  AND token = '9OkTL0yAGSOihKi0/IurzVQd8p/wtXJcbFjIymF+geQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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