Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd30b433205d7771aeecb112e937ea6e2fb891c2bf9c3850550b6cfb5b1748c8c' 
  AND token = 'TE6l+GXZPdZQgVxN8e1AtCljKmdFpGItZA4y01sj2BQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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