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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35efd52e746ec06cb8ce7ba38fa71e4893c2a61147a7dd4928a2c132df040d56' 
  AND token = 'wjp0IhxsMZ38pJYX87PxVJi2RM0/3k0Mq9pD1CJw3bk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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