Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '789ca12e2316b9c90c3cf44e78e12807711b0b9affb456fa0dbd6fef25a40bcc' 
  AND token = 'fMkJUwCT4J7i9X4cJVwZz0fk9rX26HCshU41K0W6/EM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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