SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '80dcbfe3d95c7194ad223f8f4e2853de40ff0bd222c0c6e4656a5b050851de16' 
  AND token = 'bh6PhV99QWXYawDEo0aOyJypIgpjwQnuxPFHBpqcLjc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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