Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de279fb55b68de57721f146ff4c224408f37d0bb45efbbe26f1e3a778c8fd8bf' 
  AND token = 'pMJrRoRbQA9o5IGHYRzsd+fpPfO8xOFSGrLMcmseirw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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