Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a07bf55bf05777eeb8351866c310b375d280944f7ec6204b484ef7fb60b5ab80' 
  AND token = 'FKsRWtPKiuzA626ZzZvB89KcIOE05Tqlko6BsTo9b6E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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