Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e745f1c4c42f64faaf5ee2b9923430d2537badd7f0d859a5c764660e618343f' 
  AND token = 'QSSSSGLkCbWqyRStf1heco5QRHxquOnXlhin3ZfJl5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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