SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a843f2061dc356c37d2afce8fd43912ba340f3ea86067f7a64637322429a2b5e' 
  AND token = 'lnzYhsK57uxutgXbRPNl0lwN+K9GiNnUHRf3NSvoRgY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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