Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0d67755e5619a64b2114939e317d347a19202fcc0f8e3141a3f0811b104ec61' 
  AND token = 'hFSzIRLAVavTukOWUcF3LnO5lGtbzy82MMsRQmUpl4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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