Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f1def8da41209519eb1541bb0148e06a39d5d399df0fa90cc9631a38ab71fd5' 
  AND token = '1SgY1QYAPC1tyl4g+klBhsC9Rv/scu17QsNZhgFhwJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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