SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5dd5bec955a129f7971b8532b514ff20682b53e0dcb463f9292b0db31adc92a3' 
  AND token = '7VwnKIptMytyNX+m8ImzFq0Ht5jCdCVLOLGx6lmB2i4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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