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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '353efc0fabc73ac915659f83d18a281afb54e3afb949da3a9fbfd6520e6c4237' 
  AND token = 'pdB59vZMZaKVM6C8FsKCwMQkYX6WCHW1WcVH/E57VIs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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