Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fa4f43e256373ec5809a985ba93f1e42bb98d6e080fe872537cc47484243544' 
  AND token = 'u3QZPq9p1N4fPU8cdH2R3m6Va3opVa4yuGB6CPoOPa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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