Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c0973732ec9f59e7020e1ff9ccf9662e757eb00f3943c12278a7a05019f079e' 
  AND token = 'M7StJ8pAgeJcI7mG1N7HrYEBwchujC+dyS3txdav1+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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