Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bc082d19f52227927577442efce27800aa1584757c0dd613dc3a424ee75c7ae' 
  AND token = 'MJbiAvqI7lGiqsrBeRvIPItdXKBLLSYM1xzvvH9v7AI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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