SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1eae553c6872bcba95cbd5f57b2ba6f3205d709e1d527f6122b3e27ae40344f2' 
  AND token = 'lcqF4QH0ymNjN/P/bBmy2xVIIiGVUmzlZxJh1quCOaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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