SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fc138d00138c2074ef6bae4455e3eeccdd02523371e5c0b0997a09fd71e86db5' 
  AND token = 'd/K3B8mKGT7ViffAJhkuxMIOmBX+OK0+yLh+xpRqHRE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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