SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e36c58089c4b2896c16f6aa1f8fb85100a2b6cb8e5f51db945aef994fced197' 
  AND token = 'drlxKFdJplF9z/w5xH8oPC+J9SYBKwVc69jCvMjUwp4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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