Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa3a8d198e9ae620b7e0bbf97ba4e5c9c345babbb4d9a4df6ad485cbc7825898' 
  AND token = 'gAIwodrPgs9uSGw5XU9jRItSNhi7r+CJJWdg6sih+10=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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