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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0117ea89fd08e2c7b1b1dfc66994b8ea8c6df5d2142852483cbb437e6bb08f3c' 
  AND token = 'AZlX1vwaqo61sU4LAvIjlJi9SUDEkBGaqXZPuc5Hqtk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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