Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aaed13afa77d89a8de4183065ab0784350e9ca4c76fc7c7220c852377c0121ae' 
  AND token = 'plndxHmVtumnNwTyP+M1YAe2NWuARiQyV0j019L6azs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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