Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73859936689e86fdb74617cbbb9504449aa27af892fe8e4c737460242ea10048' 
  AND token = 'EYSgjGWoPDD6fxJOwlaNb8JBJ6d1ulkf739+ZLPFz2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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