SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1aa49714c0db5f839ce9ec432c75c1e02b1d35c91af2f60d6f152d3712de7687' 
  AND token = 'TGIMYnFn00N3vWlPttn2P7zhY+PCXZGDIgl2HXiDbPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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