Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ef654476bfb810f8e924f0d9e72eff8a038342a029d80728bd7102efb9bc747' 
  AND token = '9806uFWsKtmOdvwZ35L6oYbNYHllAIVqv6t3e50yw/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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