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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'feb62096a66c57156d9222a0365f042782a2ac53473c397e9bef5708b53d282f' 
  AND token = 'K5np2Tb3zp1opQNKraIjDnlJarOyS5JN/ZLQwHv1j8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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