Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76ef52e8560d38b82f318d6a04c58e283bc71eeef1dda2f5e951d9a86435b967' 
  AND token = 'l7CpGOa5e4tQbkbcqp7irrs/ii8/XCDp+EJrlhnE5mU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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