SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9f83707373902d40672bcce24d99209583e5e8df27145f3936fe413f3f0c9aa' 
  AND token = 'tRBpiO7YqmGTV9gSXgxKbKYk/jX11GkJ6K8Kiw5H+pE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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