Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '605b42281c1d2593c73d96be8571913d2630254d9998f88310a08da9b0f44ba6' 
  AND token = 'tlLlTqSo4oh+YFFM6OOUw34M0IpJbhLtnv1SdA41+50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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