Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '545bf55013c2b7e7358d2443d19fb8702374f264cbace5ac60f005741a202465' 
  AND token = 'kcld0jiY9zP0ih7IGXDMi3F0rOFVfG8gsn5ZoEoBlB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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