Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5c56ce2fe80a15c91a41668484a95f0af56e735ca4eb8b799ca72fe91a1ae61' 
  AND token = 'mR1D5kAyfDNF80G6DFdPAXHA3hJl/KWean5FyKIq8XI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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