Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83854f0e2dd7d0b751ca044d4ab229fe4a7c73a0778972cd6589312242d56be4' 
  AND token = 'bUPidUOTLcdI4qbytWVYd1x70QuSnFRhXJwERfuFlrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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