SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1c5c8b06843d4d4c75c9a6561c67e68b0c30f541f862a6e524c1d38ae8c304ae' 
  AND token = '0TvpqhVePPbskQssK7GypvLvEOKYAiAJuOAf+hGvCmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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