Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '972a973f288a7257f3a8d8681b8c8a86fe006c7b09b28efdc23ea2daf453c2a9' 
  AND token = 'GRGAwzYHepJmqEx/fAmGT8EtoKCVJaaZmE/He0ZGV4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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