SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95599c309651741057f4917c6fa7c16ed640838db8b052352e07f0025ed68ab0' 
  AND token = 'mvqSXZmft9F/jhixfQj8YL9dEhtUki+z8u4IiAcKno4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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