Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1814dcf55c38f11dd981782c5ebae11989940bfad936f77ffe65944306b11f72' 
  AND token = 'NB5K+5i7tL+Fc0s5bn9rb0lfz3So7MyWNK3hKvkGpMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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