SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8d3b6e5da32f36e14efd7236fff785d5cc44096ca2ac7c0133bb3762ff451150' 
  AND token = '2OeKhe287zFRNDv4LiKVB0V+A5oYMPtqhG8PfhUcnHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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