Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc12930703e054419c474a899b66190530efadddcccbc4f2839cacc30af4146c' 
  AND token = 'CpigQSoCTmQ3MutaDSbHrsNpCHApqmKyF9kI9qAL+vk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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