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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73b35f49067c0d6b63b2d119556b4e52281666c0d3c6b76acc798910029fdde7' 
  AND token = 'y1v6TtZDVjJ9ae68mbzjAq2T0zI9hJORLT+EcKjjPUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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