Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6cde42e054a4ad841d5d936018c1de971e5fedef52cf286ccec82d398dcdccd2' 
  AND token = 'NwJGu4pexa20Ea4Gn5LftJAMvGc7K6j6fiE5lb/dnEQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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