Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92253a85ffb305fbd8862990c33802c1439edbadb7cebb07066b4f4b256cf864' 
  AND token = 'yGSqSMGeGUxBaeAcmfYs+aSYHMDHHjksvX0GiYQjuzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}