Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9c507ee374b2fa47942081c03714571c9a1cb9ed66c5342452f451b93d39618' 
  AND token = 'ZrDoziubbSLnUkl1G/oLzUox7gex+XaRxuhjdi5kwAM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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