Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95bffce6f9427975e902dcdc7a9a3e960b901c7288be745ba6ba8d904fbc3a10' 
  AND token = 'msr26qPmJ0vcCMEghRMjm4tPT1FkVgFb424GCwoJWsk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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