SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4bbd6093d2ec8a61f068765205faba59098d6285e23d3b8897610394d97fc43c' 
  AND token = 'LeLdsjPye5HFZdMxHikIN2l/QGlUMrVCbzOLmCWzqOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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