Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6fd3930f5d5146ce4b8bcfb929221048dc9d12237c6dd88ffe0547b37d8ab9e' 
  AND token = 'yqH98hPRFO+TokqhqjhkPwLk6X8Lss4+xwZOD5X5ccs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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