SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd80bb755788af23b64b3a1110ada9aa2a5b0184def4a3812fbba3a8a94ad3166' 
  AND token = 'LqC9K5ox/6OfmhuoZhl+HWRYO5uBE+j7wb5kTpzZBzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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