SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '366859870077d590ff41f9af91f118763c8ffd980a4112cf353e720bfb276041' 
  AND token = 'B2TQVVofGHnmgXWcQR2flC2UZIFGvniIILh5vLQgt+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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