Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9d6e97e53609f613f449af76d0c9c87fa7b57033f9cf5bb64e141bb2385d198' 
  AND token = 'EiXqV4mbyV2Fw7ksiO8kBC4Jz0W2dBvGkuwCiAtKffI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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