Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc0de75df862c74d2856bf3148a73b1f48596fa00d947b038dedb102521d43ec' 
  AND token = 'riXDjejOqJnzeBM2Vibb3X6Qp698WaR+9QH51MJ//s4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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