SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dcc97b6cd2a0632d5774a527238eb652a47e097415a3f5a9f6fa6b53e80a4de8' 
  AND token = '6uzJa3yBIJophckFfACYGLfmZGCvPXTdNBjK04tzI1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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