Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fa32a9afcb203a5e52ccf6cdb3598faf9d2f3229e4e627d29f69163d1aa1b27' 
  AND token = '7rNpCboquRuxXu+gCgqEMROC4PvKlEnCNkZpf6WH7A8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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