Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '72d3a79def3df57951bc265340c0460ada0cea16501c4d8b92f0f7bdd4a3e290' 
  AND token = 'LoUUyrBngiKgUVMjF8iDMjaJNjmHzcYXOecOYDML81A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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