Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a28c1ec7b0f558d5de388f4ee2374589c603112a6bcefdd53dd6cfa60c21476b' 
  AND token = 'CYnfk5vh5wi3ro8Su14fp458rlsYLkfcWQkL5jKUL2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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