Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb7ed1dd4b5de6db7cc30f7559f2ac074f29a7c53bba1a05f2722550159b2296' 
  AND token = 'e5Upg4/uLMQfjlnBoiRhH+aelLYKKkMECGnuEFR9+0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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