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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '172112158b44a3730c7ca6d5cf532c906c84a3859ab41a672ee21258b09f10c5' 
  AND token = 'TkSi33M+aL03syS74/cFTN8Kuy4K0riBb4mTROk2Pyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}