Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d286f82b0d931fee1600a48c6a84837de4b0a0fb2dcda564490efd9d0e3835d' 
  AND token = 'zNAlfUE6xPuSRR/2tegS9sLYa5z3TjGXE70JvubDbeo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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