Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dedfce66aa712330f8ffd9a462a8e46d49c9ae34f9ad4605ce3c920d1b59831' 
  AND token = 'pPA0DhclyzbAltEYybMM4kSdELEjYVKgbs31boYmuKo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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