Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0b05bd419cedacf7aae4c253282464f0e9ab509cd7542f0ec1643e79ef41784' 
  AND token = 'r0HOG8LPux5Bx4trxo2BMe+RoGr56wszL/YxaYiLvWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00067

JSON explain

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