Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23dcc7d7b525b7c835faad78fe26af9d01efd3494c99e1939b9ac15d53f1580a' 
  AND token = 'bt4SY+tTOfwy/AgrzvI6ElwCXm5ea6OCoRAb+Azg9/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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