Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3c49fd16977372a08d4292050e06237bd9708477be198fccfab0da97641ab11' 
  AND token = 'EakETkptWnHAajH6Nyd1/pNRvGBNwACb6/HtoKWOjqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00085

JSON explain

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