Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbfea1ce5bf0fb3f79603ab123c40b47c9661111b96da0f11bee2107f13b542a' 
  AND token = 'YV6BDroXM5W5cqrqLdAMJ6to9yfZXrQXcPr8M7H04nM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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