Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '202fee3c97599fbfb21b7b2e38b241aa7bddf48b6a25dac72503d2030ff75d5a' 
  AND token = 'rj3FcCfFuIiAc9MYFXk+kxfeo41BYw15ixbI0E8oGbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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